Tohuwabohu excorcism

Tool to track B changes

TO clean up the checksum after the change do

update databasechangelog set md5sum = null where filename = '2014_10_27.xml';

Liquibase stores all metadata in 2 tables:

CREATE TABLE PUBLIC.DATABASECHANGELOGLOCK ...
CREATE TABLE PUBLIC.DATABASECHANGELOG ...

• There is the syntax of the liquibase call.
• The Driver name: org.h2.Driver
• THe location of the Driver is: c:\doj\materials\Liquibase\h2jar\h2-1.4.197.jar

liquibase --driver=org.h2.Driver --classpath="c:\doj\materials\Liquibase\h2jar\h2-1.4.197.jar"  --changeLogFile=../changelogs/extend.user.changelog.liquibase.xml --url="jdbc:h2:tcp://localhost:9092/mem:dbname" --username=mydbuser --password=mydbpass migrate

<?xml version="1.0" encoding="UTF-8"?>

<databaseChangeLog 
        logicalFilePath="db-init-changelog"
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd
        http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd"  >

    <changeSet author="alf" id="add-nickname-to-users" logicalFilePath="add-nickname-to-users">
        <addColumn tableName="User">
            <column name="nickname" type="varchar(8)"/>
        </addColumn>
    </changeSet>

    <changeSet author="alf" id="sqlfile-usernames-add-nicknames" logicalFilePath="sqlfile-usernames-add-nicknames">
        <sqlFile dbms="h2, oracle"
                encoding="utf8"
                endDelimiter="\nGO"
                path="extend.user.changelog.liquibase.sql"
                relativeToChangelogFile="true"
                splitStatements="true"
                stripComments="true"/>
    </changeSet>

</databaseChangeLog>

To avoid the repetition of already executed changeSets - explicitely set the logicalFilePath on the databaseChangeLog and every chagneSet.

The table tracks each changeSet as a row, identified by a combination of the “id”, “author” and a “filename” column which stores the path to the changelog file.

Please note that the filename column stores the path to the changelog. This may be an absolute path or a relative path depending on how the changelog was passed to Liquibase. For best results, it should be a relative path.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<databaseChangeLog logicalFilePath="does-not-matter" xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd">

    <changeSet logicalFilePath="path-independent" author="authorId" id="1">
        ...
    </changeSet>

</databaseChangeLog>

https://www.liquibase.org/documentation/databasechangelog.html

# create a tunnel to the STAGE ssh jump server and the postgres db on STAGE
sudo ssh -i /home/vagrant/.ssh/ssh.openssh.priv -NL 9000:privatedbdns.com:5432 myuser@11.222.33.111 -v

# connect the postgres database
psql -h localhost -p 9000 -U MyAdmin --dbname my_db

# PSQL password:
thepassword

# list schemas
select schema_name
from information_schema.schemata;

# list tables
\dt *.*

# show the liquibase history
SELECT * FROM databasechangelog;

# remove the liquibase history
DELETE FROM databasechangelog;



# MANUAL creation of the schema. DONT DO THAT
CREATE SCHEMA my_db;

# MANUAL REMOVAL of the schema. DONT DO THAT!!!!!!!!!!!!!!!!!!!
DROP SCHEMA my_db CASCADE;